import axios from 'axios';
import { ElNotification, ElMessageBox, ElMessage, ElLoading } from 'element-plus';
import { getToken } from '@/utils/auth';
import errorCode from '@/utils/errorCode';
import { tansParams, blobValidate } from '@/utils/ruoyi';
import cache from '@/plugins/cache';
import { saveAs } from 'file-saver';
import useUserStore from '@/store/modules/user';

let downloadLoadingInstance;
// 是否显示重新登录
export let isRelogin = { show: false };

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8';
axios.defaults.headers['Content-Language'] = 'zh_CN';

// 创建axios实例
const service = axios.create({
  baseURL: import.meta.env.VITE_APP_BASE_API,
  timeout: 100000
});

// request拦截器
service.interceptors.request.use(config => {
  const isToken = (config.headers || {}).isToken === false;
  const isRepeatSubmit = (config.headers || {}).repeatSubmit === false;

  // 是否需要设置 token
  if (getToken() && !isToken) {
    config.headers['Authorization'] = 'Bearer ' + getToken();
  }

  // 在每个请求中添加时间戳，防止缓存
  if (config.method === 'get') {
    config.params = config.params || {};
    config.params['_t'] = new Date().getTime();
  } else if (config.method === 'post' || config.method === 'put') {
    config.data = config.data || {};
    config.data['_t'] = new Date().getTime();
  }

  // get请求映射params参数
  if (config.method === 'get' && config.params) {
    let url = config.url + '?' + tansParams(config.params);
    url = url.slice(0, -1);
    config.params = {};
    config.url = url;
  }

  // 防止数据重复提交
  if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
    const requestObj = {
      url: config.url,
      data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
      time: new Date().getTime()
    };
    const sessionObj = cache.session.getJSON('sessionObj');
    if (!sessionObj) {
      cache.session.setJSON('sessionObj', requestObj);
    } else {
      const interval = 1000; // 间隔时间(ms)
      if (sessionObj.data === requestObj.data && requestObj.time - sessionObj.time < interval && sessionObj.url === requestObj.url) {
        const message = '数据正在处理，请勿重复提交';
        console.warn(`[${sessionObj.url}]: ` + message);
        return Promise.reject(new Error(message));
      } else {
        cache.session.setJSON('sessionObj', requestObj);
      }
    }
  }

  return config;
}, error => {
  console.log(error);
  return Promise.reject(error);
});

// 响应拦截器
service.interceptors.response.use(res => {
  const code = res.data.code || 200;
  const msg = errorCode[code] || res.data.msg || errorCode['default'];

  if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
    return res.data;
  }

  if (code === 401) {
    if (!isRelogin.show) {
      isRelogin.show = true;
      ElMessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', { confirmButtonText: '重新登录', cancelButtonText: '取消', type: 'warning' })
        .then(() => {
          isRelogin.show = false;
          useUserStore().logOut().then(() => {
            location.href = import.meta.env.VITE_APP_CONTEXT_PATH + 'index';
          });
        })
        .catch(() => {
          isRelogin.show = false;
        });
    }
    return Promise.reject('无效的会话，或者会话已过期，请重新登录。');
  } else if (code === 500) {
    ElMessage({ message: msg, type: 'error' });
    return Promise.reject(new Error(msg));
  } else if (code === 601) {
    ElMessage({ message: msg, type: 'warning' });
    return Promise.reject(new Error(msg));
  } else if (code !== 200) {
    ElNotification.error({ title: msg });
    return Promise.reject('error');
  } else {
    return Promise.resolve(res.data);
  }
}, error => {
  console.log('err' + error);
  let { message } = error;
  if (message === "Network Error") {
    message = "后端接口连接异常";
  } else if (message.includes("timeout")) {
    message = "系统接口请求超时";
  } else if (message.includes("Request failed with status code")) {
    message = "系统接口" + message.substr(message.length - 3) + "异常";
  }
  ElMessage({ message: message, type: 'error', duration: 5 * 1000 });
  return Promise.reject(error);
});

// 通用下载方法
export function download(url, params, filename, config) {
  downloadLoadingInstance = ElLoading.service({ text: "正在下载数据，请稍候", background: "rgba(0, 0, 0, 0.7)" });
  return service.post(url, params, {
    transformRequest: [(params) => { return tansParams(params); }],
    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
    responseType: 'blob',
    ...config
  }).then(async (data) => {
    const isBlob = blobValidate(data);
    if (isBlob) {
      const blob = new Blob([data]);
      saveAs(blob, filename);
    } else {
      const resText = await data.text();
      const rspObj = JSON.parse(resText);
      const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default'];
      ElMessage.error(errMsg);
    }
    downloadLoadingInstance.close();
  }).catch((r) => {
    console.error(r);
    ElMessage.error('下载文件出现错误，请联系管理员！');
    downloadLoadingInstance.close();
  });
}

export default service;

// 获取WebSocket URL
export function getWebSocketUrl(path) {
  const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
  return `${protocol}//106.54.211.74:28080${path}`;
}
